Rivet



(No Model.)

I. G. PLATT.

RIVET.

No. 420.828. Patented Feb. 4, 1890.

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UNITED STATES PATENT OFFICE.

IRVING G. PLATT, OF WATERBURY, CONNECTICUT.

RIVET.

SPECIFICATION forming part of Letters Patent No. 420,828, dated February4, 1890.

Application filed June I 1889! Serial No. 312,373- (No model.)

To all whom it may concern:

Be it known that I, IRVING G. PLATT, residing at Waterbury, in thecounty of New Haven and State of Connecticut, have invented certain newand useful Improvements in Rivets; and I do declare the following to bea full, clear, and exact description of the same, reference being had tothe accompanying drawings, which form a part of this specification.

My invention relates to an improvement in that class of rivets formedfrom sheet metal, and each consisting of a head and two tapering prongsof curved cross-section seated within the said head and at a right anglethereto.

Heretofore these rivets have had sharply pointed ends, and have beenobjectionable in that the same are liable to curl inward in using therivets, unless that tendency is especially provided against by the useof a tapering die spreading the points and forcing them to turn outward,but objectionable, as it draws and puckers the material and rendersimpossible the securing of as nice a job as may be done with aperfectly-fiat die. The said rivets are also objectionable because theirpoints, being very slender, do not break down and lie fiat upon thecloth, but curl or arch over and clear the cloth, except at their outerends, which engage with and often cut it. These arching ends stand awayfrom the cloth and defeat the fiat finish which it is desired to securein the rivet.

My invention is designed to overcome the objections above cited incidentto rivets havingsharply-pointed prongs; and it consists in a rivethaving blunt-ended prongs.

In the accompanying drawings, Figure 1 is a view in vertical sectionshowing a rivet with sharply-pointed prongs,a tapering die, such as isused forforcing the prongs to turn outward, and a fragment of cloth, andillustrating how the ends of the prongs arch over the same. Fig. 2 is aview in end elevation of a rivet embodying my invention. Fig. 3 is aview thereof in vertical section on the line a b of Fig. 2. Fig. 4 isaplan view of such a blank as may be employed in making my improvedrivets, and Fig. 5 is a view corresponding to Fig. 1 and illustratinghow my improved rivets operate.

The old rivet (shown by Fig. 1 of the draw ings) consists of ahead A andtwo slender prongs B B, the prongs having practically no support andbending one way as readily as another. The same figure of the drawingsshows a tapering die C for forcing the points to bend outward.

My improved rivet (shown by the remaining figures of the drawings)consists of a head A, preferably of circular form, and of two taperingprongs curved or bowed in crosssection, having parallel outer faces B B,blunt ends C C, and re-enforcing webs D D D D,

widening from the said ends to the bases of the prongs, which are seatedwithin the said head at a right angle thereto. The said webs extend ineffective width to the very ends of the prongs and prevent the same fromturning inward when subjected to lengthwise pressure. Consequently theends of the prongs invariably turn outward, as it is desired they shoulddo, and this with a flat die, whereby with my improved rivet I insurethe outward turning of the prongs and employ the die adapted to securethe neatest work.

In applying my improved rivet the prongs break down sharply and, makingan abrupt turn, lie flat upon the cloth, the surface whereof istherefore not appreciably interrupted by them. By properly portioning ordisposing the metal in the prongs of my improved rivet the prongs may bemade to break down abruptly at a point as near the rivethead as thethickness of the fabric will permit. This cannot be done with a rivethaving long pointed prongs which are too slender and contain too littlemetal at their extreme ends to admit of it.

Having fully described my invention, what I claim as new, and desire tosecure by Let.-

ters Patent, is-

A sheet-metal rivet having a head and two tapering prongs curved orbowed in crossseotion, having straight parallel outer faces, blunt ends,and re-enforoing Webs located upon their inner faces and extending ineffective width to their very ends, which are thereby prevented fromcurling inward under pressure, substantially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

IRVING G. PLATT. Witnesses:

Guns. B. SHUMWAY, WM. T. BOOTH.

